the ratio that is equal to 10:85 is 20:170 because if you multiply both sides by two you get 20:170
You should try talking to them?
Answer:
s is
Step-by-step explanation:
From the question we are told that
The data is
Generally the mean is evaluated as
The standard deviation is mathematically represented as
Answer:
The student's current average score will be 69.2
Step-by-step explanation:
Let first test be TEST A: which is 20 of total and secures 62
Let second test be TEST B: which is 20 of the total marks and has secured 83.
Let third test be TEST C: which is 20 of total and has secured 91.
And now the TEST D which is 25 of total and has secured 88.
Therefore, by multipying across
= 12.4
= 16.6
= 18.2
=22
Now, by adding the scores to get the average score
We get, 69.2.